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pshichka [43]
3 years ago
14

Which is the goal of science?

Physics
2 answers:
Irina-Kira [14]3 years ago
8 0
The goal of Science is to expand knowledge.
Musya8 [376]3 years ago
8 0

Answer:

konwledge

Explanation:

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In what part of a volcano would you expect to find rocks with the coarsest grains
galben [10]

Answer:

The correct answer is: in the magma chamber.

Explanation:

The volcanoes are creating igneous rocks, and they can be intrusive and extrusive. The intrusive ones are forming deep into the ground, while the extrusive are forming on the surface. Where the rocks are formed makes a big difference in their crystals size. The rocks that form by magma that has cooled the deepest into the ground would have the largest crystals, thus the coarsest grains. The reason for this is that the magma that has been cooling the deepest into the ground will be exposed to higher temperatures and pressures, which will lead to a very slow cooling off. Because the cooling off will be at such a slow rate, the crystals will have enough time to became much larger. The deepest part of a volcano is its magma chamber, thus it will be the place that will produce the coarsest grained igneous rocks.

4 0
3 years ago
You are going sledding with your friends, sliding down a snowy hill. Friction can't be ignored. Riding solo on your sled, you ha
Musya8 [376]

If you let a friend ride with you, increasing the mass does increase the net force on the system, but it also increases the inertia. a=Fnetm. Since both the net force and mass are increased they still cancel, leaving the acceleration the same.

<h3>Further explanation </h3>

Inertia is the tendancy of a moving object to keep moving in a straight line or of any object to resist a change in motion.

According to the picture below, we choose x-direction parallel to the inclined surface. Our positive direction is to the right. Hence, we will calculate the acceleration when riding solo first:

\Sigma F_x = mg sin \theta - F_k = m a_x\\mg sin \theta - F_k = m a_x\\a_x = \frac{mg sin \theta - F_k }{m} ... (1)\\

\Sigma F_y = F_n - mg cos \theta = m a_y = 0\\F_n = mg cos \theta\\F_k = \mu_k F_n\\F_k = \mu_k mg cos \theta\\

Put (2)  into  (1)  

a = \frac{m g sin \theta - \mu_k m g cos \theta}{m} \\a = g sin \theta - \mu_k g cos \theta

From the equation 3, we found that the acceleration does not depend on the mass of the object. Notice that:

g  is constant

\theta is constant,

\mu_k is constant

So that, a  is constant whatever the amount of the mass is

<h3>Learn more</h3>
  1. Learn more about inertia brainly.com/question/720714

<h3>Answer details</h3>

Grade:  9

Subject: physics

Chapter:  inertia

Keywords:  inertia

5 0
3 years ago
Read 2 more answers
When sodium and chlorine make table salt, it releases heat during the reaction. *
miskamm [114]

Answer:

Which by-product of the chloralkali process is used for the manufacture of bleaching powder?

Ans. Chlorine (Cl2).

Q. 21. Which compound of calcium is used for sterilization of drinking water?

Ans. Bleaching powder (CaOCI2)

Q. 22. What is the action of sulphuric acid on bleaching powder?

Ans. CaOCl2+H SO4 —>CaSO4+H2O+ Cl2

Q.23. What happens when bleaching powder is kept in the air?

or Why bleaching powder gives out a typical smell in the air?

5 0
3 years ago
Which of these would have the highest temperature?<br><br> A. ice<br> B. water<br> C. water vapor
fiasKO [112]

Answer:

Water vapor

Explanation:

because water vapor is gas and gas particles move faster than solid particles (which stick together) and water particles ( with a somewhat normal movement) and the faster the particle, the hotter the substance is. With that being said C is the correct answer.

6 0
3 years ago
An object with a charge of -2.9 μC and a mass of 1.0×10^−2 kg experiences an upward electric force, due to a uniform electric fi
ki77a [65]

Answer:

  1. E=3.38*10^{4}N/C
  2. The new acceleration will have a value equal to gravity (9.81m/s^2) but pointing upwards.

Explanation:

The electric Force and gravitational Force are the same:

m*g=E*q

E=m*g/q=1.0*10^{-2}*9.81/(2.9*10^{-6})=3.38*10^{4}N/C

If the Electric field is doubled, the Electric Force is doubled, so its new value is twice the weight of the object. If we add this new electric force (upwards), with the weight (downwards), we have a resulting force upwards = one time the weight. in conclusion the acceleration will have a value equal to gravity but pointing upwards.

8 0
3 years ago
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